Climbers use those terms.
Power endurance refers to that grey area between pure power (1RM in weightlifting terms) and endurance (running, rowing, 1000 broomstick snatches, etc). So, yes, high rep snatches would be an example... as long as it's at a sufficiently high weight, that doing one is "difficult".
Fran at any sub 5min time is a perfect example.
Strenght endurance is a bit more blurry... it can either mean static strenght "holds" ie... the farmers walk example. Or closer to just endurance... the ability to keep climbing all day...